As unlikely as it seems, Donald Trump has finally found a camera that he doesn't want to shove his face into.

The "Celebrity Apprentice" honcho and potential presidential candidate fired off a letter to "The Late Show With David Letterman," canceling a May 18 appearance because Letternan said Trump's recent actions "smacked of racism," the New York Post reported.

Taking exception to Trump's questioning of whether President Barack Obama was qualified to attend Columbia University and Harvard Law School, and whether he actually wrote his first book himself, Letterman told McGraw, "It's all fun, it's all a circus, it's all a rodeo until it starts to smack of racism. And then it's no longer fun."